Individual Details

The connection of Mary to a father as Rev. John Sherman seems to an error in the book re the early settlers of Watertown seems to be an error.
The Rev. John left a will - and he had two daughters named Mary:
His eledest, Mary, b. about 1693, m (1) at Watertown, 27 Nov 1656, to Henry Freeman, (2) by 6 Dec 1677, Lewis Allen, also at Watertown, 24 Jan 1707/8.
Mary, b. at Watertown, 5 Mar 1656/7 married there on 27 May 1679 to Ellis Barron

Early Families of New England, database at AmericanAncestors.og has a 7-page article on Rev. John Sherman.

There was also in Watertown, a Capt John Sherman - noted in the Great Migration series - he also had a daughter Mary, b. at Watertown, 21 Feb 1640, married Timothy Hawkins, 18 Jan 1666/7.

According to the book, "The Early Records of Lancaster, Massachusetts. 1643-1725," page 298 (see https://archive.org/details/earlyrecordslan00masgoog), Mary Wilder married Daniel Allen, a cooper in Charlestown, "and upon a gift of forty acres of land from her father, they came to Lancaster, bringing children born in Charlestown and Watertown, but after some years' residence ...returned to Watertown." I am not sure this statement about bringing younger children with her is correct - from what I can tell, the 3 children born before moving to Lancaster all died before the move.

Regardless, while in Lancaster their early records show the birth of three additional children:
(p. 315) Samuell Allin 17 (2) 1664 of Daniell and Marie (Wilder)
(p. 316) Elnathan Allen 7 (11) 1666 of Daniel and Mary
(p. 316) Thomas Allen Feb. 20, 1669 of Daniel and Mary

Lancaster was the site of a smaller Indian attack in 1675 when 8 people were killed, and a much larger attack in February, 1676, when upwards of 55 people were slain or captured. The city was abandoned, burned to the ground, and uninhabited for 3 about years. It looks like Mary and Daniel left town before these attacks, not to return. Daniel was gifted land from his father in 1673 in Watertown, and they moved then or a little before to Watertown.

After their removal to Watertown, there was a death date recorded for Daniel in Lancaster records:
(p. 326) Daniel Allen in Watertown, March 1694.

Spouse	Daniel Allen ( - 1705)
Child	Daniel Allen (1659 - 1662)
Child	Rebecca Allen (1661 - 1661)
Child	Mary Allen (1662 - )
Child	Samuel Allen (1664 - )
Child	Elnathan Allen (1666 - 1734)
Child	Thomas Allen (1669 - 1671)
Child	Abigail Allen (1671 - 1762)
Child	Elizabeth Allen (1672 - )
Child	Ebenezer Allen (1674 - )
Child	Rebeccah Allen (1677 - 1678)
Child	Lydia Allen (1679 - )